#AskEden - Kama Sutra candle burning unevenly! How do I fix it?

I know, I've asked this question before in a How-To post but it never got answered. I'd like to know before V-day if anyone has suggestions about how to fix my kama sutra candle. It still burns, but the wick is short and it is burning a hole right down the center of the candle. The edges won't burn. Does anyone know if I can fix it/how? Does this normally happen to Kama Sutra candles?